Sook-hee is a trained assassin who was born to kill. She was just a little girl when the training started in Yanbian| China. After the death of her mentor| when thechance of starting a new life was given to her| she came to South Korea as a government agent. They promised her that she will be free after ten years of service. Soshe begins her new life as a theatre actress. But soon two men Joong-sang and Hyun-soo appear in her new life. And she started to find deep dark secrets about herpast. Eventually she take matters into her own hands. . You can read more in Google, Youtube, Wiki